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diff --git a/vendor/zendframework/zend-diactoros/src/ServerRequestFactory.php b/vendor/zendframework/zend-diactoros/src/ServerRequestFactory.php
new file mode 100644
index 000000000..e2ac59b66
--- /dev/null
+++ b/vendor/zendframework/zend-diactoros/src/ServerRequestFactory.php
@@ -0,0 +1,522 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @see       http://github.com/zendframework/zend-diactoros for the canonical source repository
+ * @copyright Copyright (c) 2015-2016 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   https://github.com/zendframework/zend-diactoros/blob/master/LICENSE.md New BSD License
+ */
+
+namespace Zend\Diactoros;
+
+use InvalidArgumentException;
+use Psr\Http\Message\UploadedFileInterface;
+use stdClass;
+use UnexpectedValueException;
+
+/**
+ * Class for marshaling a request object from the current PHP environment.
+ *
+ * Logic largely refactored from the ZF2 Zend\Http\PhpEnvironment\Request class.
+ *
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+abstract class ServerRequestFactory
+{
+    /**
+     * Function to use to get apache request headers; present only to simplify mocking.
+     *
+     * @var callable
+     */
+    private static $apacheRequestHeaders = 'apache_request_headers';
+
+    /**
+     * Create a request from the supplied superglobal values.
+     *
+     * If any argument is not supplied, the corresponding superglobal value will
+     * be used.
+     *
+     * The ServerRequest created is then passed to the fromServer() method in
+     * order to marshal the request URI and headers.
+     *
+     * @see fromServer()
+     * @param array $server $_SERVER superglobal
+     * @param array $query $_GET superglobal
+     * @param array $body $_POST superglobal
+     * @param array $cookies $_COOKIE superglobal
+     * @param array $files $_FILES superglobal
+     * @return ServerRequest
+     * @throws InvalidArgumentException for invalid file values
+     */
+    public static function fromGlobals(
+        array $server = null,
+        array $query = null,
+        array $body = null,
+        array $cookies = null,
+        array $files = null
+    ) {
+        $server  = static::normalizeServer($server ?: $_SERVER);
+        $files   = static::normalizeFiles($files ?: $_FILES);
+        $headers = static::marshalHeaders($server);
+
+        if (null === $cookies && array_key_exists('cookie', $headers)) {
+            $cookies = self::parseCookieHeader($headers['cookie']);
+        }
+
+        return new ServerRequest(
+            $server,
+            $files,
+            static::marshalUriFromServer($server, $headers),
+            static::get('REQUEST_METHOD', $server, 'GET'),
+            'php://input',
+            $headers,
+            $cookies ?: $_COOKIE,
+            $query ?: $_GET,
+            $body ?: $_POST,
+            static::marshalProtocolVersion($server)
+        );
+    }
+
+    /**
+     * Access a value in an array, returning a default value if not found
+     *
+     * Will also do a case-insensitive search if a case sensitive search fails.
+     *
+     * @param string $key
+     * @param array $values
+     * @param mixed $default
+     * @return mixed
+     */
+    public static function get($key, array $values, $default = null)
+    {
+        if (array_key_exists($key, $values)) {
+            return $values[$key];
+        }
+
+        return $default;
+    }
+
+    /**
+     * Search for a header value.
+     *
+     * Does a case-insensitive search for a matching header.
+     *
+     * If found, it is returned as a string, using comma concatenation.
+     *
+     * If not, the $default is returned.
+     *
+     * @param string $header
+     * @param array $headers
+     * @param mixed $default
+     * @return string
+     */
+    public static function getHeader($header, array $headers, $default = null)
+    {
+        $header  = strtolower($header);
+        $headers = array_change_key_case($headers, CASE_LOWER);
+        if (array_key_exists($header, $headers)) {
+            $value = is_array($headers[$header]) ? implode(', ', $headers[$header]) : $headers[$header];
+            return $value;
+        }
+
+        return $default;
+    }
+
+    /**
+     * Marshal the $_SERVER array
+     *
+     * Pre-processes and returns the $_SERVER superglobal.
+     *
+     * @param array $server
+     * @return array
+     */
+    public static function normalizeServer(array $server)
+    {
+        // This seems to be the only way to get the Authorization header on Apache
+        $apacheRequestHeaders = self::$apacheRequestHeaders;
+        if (isset($server['HTTP_AUTHORIZATION'])
+            || ! is_callable($apacheRequestHeaders)
+        ) {
+            return $server;
+        }
+
+        $apacheRequestHeaders = $apacheRequestHeaders();
+        if (isset($apacheRequestHeaders['Authorization'])) {
+            $server['HTTP_AUTHORIZATION'] = $apacheRequestHeaders['Authorization'];
+            return $server;
+        }
+
+        if (isset($apacheRequestHeaders['authorization'])) {
+            $server['HTTP_AUTHORIZATION'] = $apacheRequestHeaders['authorization'];
+            return $server;
+        }
+
+        return $server;
+    }
+
+    /**
+     * Normalize uploaded files
+     *
+     * Transforms each value into an UploadedFileInterface instance, and ensures
+     * that nested arrays are normalized.
+     *
+     * @param array $files
+     * @return array
+     * @throws InvalidArgumentException for unrecognized values
+     */
+    public static function normalizeFiles(array $files)
+    {
+        $normalized = [];
+        foreach ($files as $key => $value) {
+            if ($value instanceof UploadedFileInterface) {
+                $normalized[$key] = $value;
+                continue;
+            }
+
+            if (is_array($value) && isset($value['tmp_name'])) {
+                $normalized[$key] = self::createUploadedFileFromSpec($value);
+                continue;
+            }
+
+            if (is_array($value)) {
+                $normalized[$key] = self::normalizeFiles($value);
+                continue;
+            }
+
+            throw new InvalidArgumentException('Invalid value in files specification');
+        }
+        return $normalized;
+    }
+
+    /**
+     * Marshal headers from $_SERVER
+     *
+     * @param array $server
+     * @return array
+     */
+    public static function marshalHeaders(array $server)
+    {
+        $headers = [];
+        foreach ($server as $key => $value) {
+            // Apache prefixes environment variables with REDIRECT_
+            // if they are added by rewrite rules
+            if (strpos($key, 'REDIRECT_') === 0) {
+                $key = substr($key, 9);
+
+                // We will not overwrite existing variables with the
+                // prefixed versions, though
+                if (array_key_exists($key, $server)) {
+                    continue;
+                }
+            }
+
+            if ($value && strpos($key, 'HTTP_') === 0) {
+                $name = strtr(strtolower(substr($key, 5)), '_', '-');
+                $headers[$name] = $value;
+                continue;
+            }
+
+            if ($value && strpos($key, 'CONTENT_') === 0) {
+                $name = 'content-' . strtolower(substr($key, 8));
+                $headers[$name] = $value;
+                continue;
+            }
+        }
+
+        return $headers;
+    }
+
+    /**
+     * Marshal the URI from the $_SERVER array and headers
+     *
+     * @param array $server
+     * @param array $headers
+     * @return Uri
+     */
+    public static function marshalUriFromServer(array $server, array $headers)
+    {
+        $uri = new Uri('');
+
+        // URI scheme
+        $scheme = 'http';
+        $https  = self::get('HTTPS', $server);
+        if (($https && 'off' !== $https)
+            || self::getHeader('x-forwarded-proto', $headers, false) === 'https'
+        ) {
+            $scheme = 'https';
+        }
+        if (! empty($scheme)) {
+            $uri = $uri->withScheme($scheme);
+        }
+
+        // Set the host
+        $accumulator = (object) ['host' => '', 'port' => null];
+        self::marshalHostAndPortFromHeaders($accumulator, $server, $headers);
+        $host = $accumulator->host;
+        $port = $accumulator->port;
+        if (! empty($host)) {
+            $uri = $uri->withHost($host);
+            if (! empty($port)) {
+                $uri = $uri->withPort($port);
+            }
+        }
+
+        // URI path
+        $path = self::marshalRequestUri($server);
+        $path = self::stripQueryString($path);
+
+        // URI query
+        $query = '';
+        if (isset($server['QUERY_STRING'])) {
+            $query = ltrim($server['QUERY_STRING'], '?');
+        }
+
+        // URI fragment
+        $fragment = '';
+        if (strpos($path, '#') !== false) {
+            list($path, $fragment) = explode('#', $path, 2);
+        }
+
+        return $uri
+            ->withPath($path)
+            ->withFragment($fragment)
+            ->withQuery($query);
+    }
+
+    /**
+     * Marshal the host and port from HTTP headers and/or the PHP environment
+     *
+     * @param stdClass $accumulator
+     * @param array $server
+     * @param array $headers
+     */
+    public static function marshalHostAndPortFromHeaders(stdClass $accumulator, array $server, array $headers)
+    {
+        if (self::getHeader('host', $headers, false)) {
+            self::marshalHostAndPortFromHeader($accumulator, self::getHeader('host', $headers));
+            return;
+        }
+
+        if (! isset($server['SERVER_NAME'])) {
+            return;
+        }
+
+        $accumulator->host = $server['SERVER_NAME'];
+        if (isset($server['SERVER_PORT'])) {
+            $accumulator->port = (int) $server['SERVER_PORT'];
+        }
+
+        if (! isset($server['SERVER_ADDR']) || ! preg_match('/^\[[0-9a-fA-F\:]+\]$/', $accumulator->host)) {
+            return;
+        }
+
+        // Misinterpreted IPv6-Address
+        // Reported for Safari on Windows
+        self::marshalIpv6HostAndPort($accumulator, $server);
+    }
+
+    /**
+     * Detect the base URI for the request
+     *
+     * Looks at a variety of criteria in order to attempt to autodetect a base
+     * URI, including rewrite URIs, proxy URIs, etc.
+     *
+     * From ZF2's Zend\Http\PhpEnvironment\Request class
+     * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+     * @license   http://framework.zend.com/license/new-bsd New BSD License
+     *
+     * @param array $server
+     * @return string
+     */
+    public static function marshalRequestUri(array $server)
+    {
+        // IIS7 with URL Rewrite: make sure we get the unencoded url
+        // (double slash problem).
+        $iisUrlRewritten = self::get('IIS_WasUrlRewritten', $server);
+        $unencodedUrl    = self::get('UNENCODED_URL', $server, '');
+        if ('1' == $iisUrlRewritten && ! empty($unencodedUrl)) {
+            return $unencodedUrl;
+        }
+
+        $requestUri = self::get('REQUEST_URI', $server);
+
+        // Check this first so IIS will catch.
+        $httpXRewriteUrl = self::get('HTTP_X_REWRITE_URL', $server);
+        if ($httpXRewriteUrl !== null) {
+            $requestUri = $httpXRewriteUrl;
+        }
+
+        // Check for IIS 7.0 or later with ISAPI_Rewrite
+        $httpXOriginalUrl = self::get('HTTP_X_ORIGINAL_URL', $server);
+        if ($httpXOriginalUrl !== null) {
+            $requestUri = $httpXOriginalUrl;
+        }
+
+        if ($requestUri !== null) {
+            return preg_replace('#^[^/:]+://[^/]+#', '', $requestUri);
+        }
+
+        $origPathInfo = self::get('ORIG_PATH_INFO', $server);
+        if (empty($origPathInfo)) {
+            return '/';
+        }
+
+        return $origPathInfo;
+    }
+
+    /**
+     * Strip the query string from a path
+     *
+     * @param mixed $path
+     * @return string
+     */
+    public static function stripQueryString($path)
+    {
+        if (($qpos = strpos($path, '?')) !== false) {
+            return substr($path, 0, $qpos);
+        }
+        return $path;
+    }
+
+    /**
+     * Marshal the host and port from the request header
+     *
+     * @param stdClass $accumulator
+     * @param string|array $host
+     * @return void
+     */
+    private static function marshalHostAndPortFromHeader(stdClass $accumulator, $host)
+    {
+        if (is_array($host)) {
+            $host = implode(', ', $host);
+        }
+
+        $accumulator->host = $host;
+        $accumulator->port = null;
+
+        // works for regname, IPv4 & IPv6
+        if (preg_match('|\:(\d+)$|', $accumulator->host, $matches)) {
+            $accumulator->host = substr($accumulator->host, 0, -1 * (strlen($matches[1]) + 1));
+            $accumulator->port = (int) $matches[1];
+        }
+    }
+
+    /**
+     * Marshal host/port from misinterpreted IPv6 address
+     *
+     * @param stdClass $accumulator
+     * @param array $server
+     */
+    private static function marshalIpv6HostAndPort(stdClass $accumulator, array $server)
+    {
+        $accumulator->host = '[' . $server['SERVER_ADDR'] . ']';
+        $accumulator->port = $accumulator->port ?: 80;
+        if ($accumulator->port . ']' === substr($accumulator->host, strrpos($accumulator->host, ':') + 1)) {
+            // The last digit of the IPv6-Address has been taken as port
+            // Unset the port so the default port can be used
+            $accumulator->port = null;
+        }
+    }
+
+    /**
+     * Create and return an UploadedFile instance from a $_FILES specification.
+     *
+     * If the specification represents an array of values, this method will
+     * delegate to normalizeNestedFileSpec() and return that return value.
+     *
+     * @param array $value $_FILES struct
+     * @return array|UploadedFileInterface
+     */
+    private static function createUploadedFileFromSpec(array $value)
+    {
+        if (is_array($value['tmp_name'])) {
+            return self::normalizeNestedFileSpec($value);
+        }
+
+        return new UploadedFile(
+            $value['tmp_name'],
+            $value['size'],
+            $value['error'],
+            $value['name'],
+            $value['type']
+        );
+    }
+
+    /**
+     * Normalize an array of file specifications.
+     *
+     * Loops through all nested files and returns a normalized array of
+     * UploadedFileInterface instances.
+     *
+     * @param array $files
+     * @return UploadedFileInterface[]
+     */
+    private static function normalizeNestedFileSpec(array $files = [])
+    {
+        $normalizedFiles = [];
+        foreach (array_keys($files['tmp_name']) as $key) {
+            $spec = [
+                'tmp_name' => $files['tmp_name'][$key],
+                'size'     => $files['size'][$key],
+                'error'    => $files['error'][$key],
+                'name'     => $files['name'][$key],
+                'type'     => $files['type'][$key],
+            ];
+            $normalizedFiles[$key] = self::createUploadedFileFromSpec($spec);
+        }
+        return $normalizedFiles;
+    }
+
+    /**
+     * Return HTTP protocol version (X.Y)
+     *
+     * @param array $server
+     * @return string
+     */
+    private static function marshalProtocolVersion(array $server)
+    {
+        if (! isset($server['SERVER_PROTOCOL'])) {
+            return '1.1';
+        }
+
+        if (! preg_match('#^(HTTP/)?(?P<version>[1-9]\d*(?:\.\d)?)$#', $server['SERVER_PROTOCOL'], $matches)) {
+            throw new UnexpectedValueException(sprintf(
+                'Unrecognized protocol version (%s)',
+                $server['SERVER_PROTOCOL']
+            ));
+        }
+
+        return $matches['version'];
+    }
+
+    /**
+     * Parse a cookie header according to RFC 6265.
+     *
+     * PHP will replace special characters in cookie names, which results in other cookies not being available due to
+     * overwriting. Thus, the server request should take the cookies from the request header instead.
+     *
+     * @param $cookieHeader
+     * @return array
+     */
+    private static function parseCookieHeader($cookieHeader)
+    {
+        preg_match_all('(
+            (?:^\\n?[ \t]*|;[ ])
+            (?P<name>[!#$%&\'*+-.0-9A-Z^_`a-z|~]+)
+            =
+            (?P<DQUOTE>"?)
+                (?P<value>[\x21\x23-\x2b\x2d-\x3a\x3c-\x5b\x5d-\x7e]*)
+            (?P=DQUOTE)
+            (?=\\n?[ \t]*$|;[ ])
+        )x', $cookieHeader, $matches, PREG_SET_ORDER);
+
+        $cookies = [];
+
+        foreach ($matches as $match) {
+            $cookies[$match['name']] = urldecode($match['value']);
+        }
+
+        return $cookies;
+    }
+}